Method of knitting a backed fabric with binding thread



June 3, 1958 J. DEISS ETAL 7 METHOD OF KNITTING A BACKED FABRIC WITH BINDING THREAD Filed April 16, 1954 F192 United States Patent METHOD OF KNITTENG A BACKED FABRIC WITH BINDENG THREAD Jaroslav Deiss, Tisnov, and Jaroslav Dvorak, Brno- Obrany, Czechoslovakia, assignors to Vyzkurnmy ustav tvarecich strain a technologie tvarevi, Brno, Czechoslovakia Application April 16, 1954, Serial No. 423,633

Claims priority, application Czechoslovakia April 20, 1953 1 Claim. (Cl. 66-9) The present invention relates to a method of, and device for, knitting a backed fabric with binding thread.

A knitting method has already been suggested to be carried out on circular knitting machines with latch needles and with sinkers extending from the outside inwardly towards the needles, the fabric being knocked over inwards into the needle ring. The sinker has two drawingin planes arranged in superposed relation. The fabric is manufactured of the backing thread, the binding thread and the facing thread the latter having to appear on the right side of the fabric so as to make both the backing thread and the binding thread invisible.

With this well known knitting process, the backing laid on is sunk in the top sinking plane and the binding thread laid on is likewise sunk in the top sinking plane whilst the backing is knocked over. Finally, the facing thread is laid above the sinkers, said facing thread after being seized by the needle hook being sunk along with.

the binding thread in the bottom sinking plane and at the same time the previous row is knocked over on the sinkers. Since the facing thread is laid above the sinkers, it comes out on the needle shank in a position above the binding thread and after the row is knocked over it remains on the wrong side of the fabric thus failing to fulfil its function that is, covering the backing and the binding thread. For this reason, it is impossible to manufacture a backed fabric with binding thread as has been manufactured hitherto exclusively on circular knitting frames.

The aforesaid drawback has now been eliminated by the knitting method in accordance with the present invention which is characterised by the feature that after feeding the filling thread and sinking the loop of the binding thread in the top' sinking plane the facing thread is laid in the bottom sinking plane so as to come out on the needle shank underneath the binding thread and after the row is knocked over on the machine 'bed the facing thread remains on the right side of the fabric thus covering both the binding thread and filling thread.

This knitting process can be carried out by the arrangement of the sinkers in the device according to the present invention inside the needle ring thus enabling the facing thread to be laid without hindrance in the bottom sinking plane.

The knitting method according to the present invention and the device therefor are described hereafter more in detail with reference to the accompanying drawing, wherein Fig. 1 illustrates the relative positions of the needle and sinker,

Fig. 2 illustrates the knitting process on laying the filling thread underneath two needles,

Fig. 3 shows the resulting fabric as viewed from the wrong side on laying the filling thread under three needles,

Fig. 4 shows the needle opener.

Referring now to the drawing, in Fig. 1, the numeral 1 indicates a latch needle of the well known type, 2 a

2,836,970 Patented June 3, 1958 sinker extending from the centre of the machine towards the needle. The sinker has a top sinking plane 3 and a bottom sinking plane 4. The numeral 5 indicates the plane of the bed, 6 the filling thread, 7 the binding thread and 3 the facing thread. The needles and sinkers are actuated through the conventional mechanisms not illustrated in the drawing, the threads being fed successively on three points of the circumference of the needle ring in the following order: filling, binding thread, facing thread.

The knitting operation is as follows:

First the selected needles 1 are raised into the tuck position relative to the plane 5 of the needle bed. Into these needles the filling thread 6 is laid in the top sinking plane 3. Whilst the selected needles 1 after receiving the filling thread 6 remain in the plane to which they had been raised, the other (non-selected) needles 1 (in any desired division) are raised to the same plane, the filling thread 6 gliding along the needle hook back into a position behind the needle. The filling thread is held by the hook catch, 9. Thereupon all needles 1 and 1 are raised into the latch-clearing position with regard to the top sinking plane 3. Then follows the sinking of the needles during which the binding thread is positioned above the top sinking plane 3, the sinking takes place in the top sinking plane and simultaneously the filling thread 6 is knocked over on the selected nee dles 1 Thereupon all needles are raised to the tuck position with regard to the bottom sinking plane 4. During this motion the needle latches are thrown open by the sprung needle opener 10.

Whilst the loops of the binding thread 7 together with the filling thread 6 are held in the top sinking plane 3 of the sinkers, the facing thread 8 is laid in the bottom sinking plane 4 on the open needle latches. On the following needle sinking motion, the facing thread 8 is drawn into loops simultaneously with the binding thread 7 in the bottom sinking plane 4. On the row thus prepared the loops of the previously finished row are knocked over in the plane of the bed.

Obviously, the previous row need not be knocked over in the plane of the bed, but may instead be knocked over in a plane lying between the bottom sinking plane 4 and the plane 5 of the bed, it being possible to knock it over e. g. on further auxiliary sinkers instead of on the machine bed.

We claim:

A method of knitting backed fabric with binding thread on a circular knitting machine having latch needles and sinkers with two sinking planes, comprising the steps of successively feeding a filling thread and a binding thread on the circumference of the needle ring, drawing-in the loops of the binding thread in the upper sinking plane, laying-in a facing thread in the lower sinking plane upon needles which are positioned so that the ends of the open needle latches are disposed below said lower sinking plane, laying the loops of the binding thread upon said needles between said facing thread and the hooks of the needles, and knocking-over the fabric in a plane disposed below said lower sinking plane.

References Cited in the file of this patent UNITED STATES PATENTS 2,094,180 Mishcon Sept. 28, 1937 2,098,303 Moses Nov. 9, 1937 2,104,231 Lawson Ian. 4, 1938 2,333,667 Moss Nov. 9, 1943 FOREIGN PATENTS 1.074.783 France Apr. 7, 1954 

